xianyan/lib/features/discover/services/push_scheduler.dart

// ============================================================
// 闲言APP — 会话流推送调度器
// 创建时间: 2026-04-30
// 更新时间: 2026-04-30
// 作用: 检查时段/天气/情景，生成智能推送消息
// 上次更新: 初始创建
// ============================================================

import 'package:xianyan/core/utils/logger.dart';
import 'package:xianyan/features/discover/models/chat_message.dart';

class PushScheduler {
  PushScheduler._();

  static const _maxMessagesPerDay = 10;

  static List<ChatMessage> checkAndGenerate(
    Set<String> triggeredToday,
    int todayCount,
  ) {
    if (todayCount >= _maxMessagesPerDay) return [];

    final now = DateTime.now();
    final hour = now.hour;
    final messages = <ChatMessage>[];

    _checkGreeting(hour, triggeredToday, messages);
    _checkScenario(now, triggeredToday, messages);

    return messages;
  }

  static void _checkGreeting(
    int hour,
    Set<String> triggeredToday,
    List<ChatMessage> messages,
  ) {
    if (hour >= 6 && hour < 9 && !triggeredToday.contains('morning')) {
      messages.add(
        ChatMessage(
          id: 'push_morning_${DateTime.now().millisecondsSinceEpoch}',
          type: ChatMessageType.greeting,
          role: ChatMessageRole.assistant,
          text: '早安！新的一天，从一句好话开始 ✨',
          timestamp: DateTime.now(),
          meta: {'pushType': 'morning'},
        ),
      );
      triggeredToday.add('morning');
      Log.i('推送调度: 早安问候已生成');
    }

    if (hour >= 11 && hour < 13 && !triggeredToday.contains('noon')) {
      messages.add(
        ChatMessage(
          id: 'push_noon_${DateTime.now().millisecondsSinceEpoch}',
          type: ChatMessageType.greeting,
          role: ChatMessageRole.assistant,
          text: '中午了，记得吃饭 🍜 饭后看看好句放松一下',
          timestamp: DateTime.now(),
          meta: {'pushType': 'noon'},
        ),
      );
      triggeredToday.add('noon');
      Log.i('推送调度: 午间提醒已生成');
    }

    if (hour >= 14 && hour < 15 && !triggeredToday.contains('afternoon')) {
      messages.add(
        ChatMessage(
          id: 'push_afternoon_${DateTime.now().millisecondsSinceEpoch}',
          type: ChatMessageType.greeting,
          role: ChatMessageRole.assistant,
          text: '下午好 ☕ 来杯茶，读一句好话提提神',
          timestamp: DateTime.now(),
          meta: {'pushType': 'afternoon'},
        ),
      );
      triggeredToday.add('afternoon');
      Log.i('推送调度: 下午问候已生成');
    }

    if (hour >= 21 && hour < 23 && !triggeredToday.contains('night')) {
      messages.add(
        ChatMessage(
          id: 'push_night_${DateTime.now().millisecondsSinceEpoch}',
          type: ChatMessageType.greeting,
          role: ChatMessageRole.assistant,
          text: '夜深了，该休息了 🌙 明天又是美好的一天',
          timestamp: DateTime.now(),
          meta: {'pushType': 'night'},
        ),
      );
      triggeredToday.add('night');
      Log.i('推送调度: 晚间关怀已生成');
    }
  }

  static void _checkScenario(
    DateTime now,
    Set<String> triggeredToday,
    List<ChatMessage> messages,
  ) {
    final month = now.month;
    final day = now.day;
    final key = 'scenario_${month}_$day';

    if (triggeredToday.contains(key)) return;

    final scenario = _scenarioMessages[DateTime(month, day)];
    if (scenario != null) {
      messages.add(
        ChatMessage(
          id: 'push_scenario_${now.millisecondsSinceEpoch}',
          type: ChatMessageType.scenario,
          role: ChatMessageRole.assistant,
          text: scenario,
          timestamp: now,
          meta: {'pushType': 'scenario', 'date': '$month-$day'},
        ),
      );
      triggeredToday.add(key);
      Log.i('推送调度: 情景推送已生成 ($month-$day)');
    }
  }

  static final Map<DateTime, String> _scenarioMessages = {
    DateTime(1): '新年快乐！🎆 新的一年，新的开始',
    DateTime(2, 14): '情人节快乐 今天送你一句关于爱的话',
    DateTime(3, 8): '妇女节快乐 🌸 致敬每一位了不起的她',
    DateTime(4, 23): '世界读书日 📚 送你一句关于阅读的话',
    DateTime(5): '劳动节快乐 🎉 辛苦了，休息一下吧',
    DateTime(5, 4): '青年节快乐 🔥 愿你永远年轻，永远热泪盈眶',
    DateTime(6): '儿童节快乐 🧒 保持童心，保持好奇',
    DateTime(9, 10): '教师节快乐 🎓 感恩每一位引路人',
    DateTime(10): '国庆节快乐 🇨🇳 祝祖国繁荣昌盛',
    DateTime(12, 25): '圣诞节快乐 🎄 愿温暖与你同在',
    DateTime(12, 31): '跨年快乐 🎆 告别旧年，迎接新希望',
  };

  static String todayDateKey() {
    final now = DateTime.now();
    return '${now.year}-${now.month}-${now.day}';
  }
}